Refactor coreaudio host and add iOS support + ios-feedback example

Cargo.toml

@@ -34,7 +34,8 @@ libc = "0.2.65"
 jack = { version = "0.6.5", optional = true }
 
 [target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies]
-coreaudio-rs = { version = "0.9.1", default-features = false, features = ["audio_unit", "core_audio"] }
+#coreaudio-rs = { version = "0.9.1", default-features = false, features = ["audio_unit", "core_audio"] }
+coreaudio-rs = { git = "https://github.com/MichaelHills/coreaudio-rs", branch = "mike-ios-support" }
 core-foundation-sys = "0.6.2" # For linking to CoreFoundation.framework and handling device name `CFString`s.
 mach = "0.3" # For access to mach_timebase type.
 

examples/ios-feedback/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "cpal-ios-example"
+version = "0.1.0"
+authors = ["Michael Hills <mhills@gmail.com>"]
+edition = "2018"
+
+[lib]
+name = "cpal_ios_example"
+crate-type = ["staticlib"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cpal = { path = "../.." }
+anyhow = "1.0.12"
+ringbuf = "0.1.6"
+

examples/ios-feedback/build_rust_deps.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+PATH=$PATH:$HOME/.cargo/bin
+
+# If you want your build to run faster, add a "--targets x86_64-apple-ios" for just using the ios simulator.
+if [ -n ${IOS_TARGETS} ]; then
+    cargo lipo --targets ${IOS_TARGETS}
+else
+    cargo lipo
+fi